Magnetic door stop



Sept. 4, 1956 R. A. TOOL 2,761,718

MAGNETIC DOOR STOP Filed Nov.. 25, 1955 IN V EN TOR.

05587 /4. 700i BY ATTOZ/VE Y5 United States Patent MAGNETIC DOOR STOPRobert A. Tool, Cambridge, N. J. Application November 25, 1955, SerialNo. 548,919

2 Claims. (Cl. 292251.5)

This invention relates to door stops, and more particularly to animproved magnetic door stop of the sprlngcushioned type.

A main object of the invention is to provide a novel and improvedmagnetic door stop which is simple in construction, which is easy toinstall, and which retains doors against undesired closure or slamming.

A further object of the invention is to provide an improved magneticdoor stop of the spring-cushioned type, said door stop being inexpensiveto manufacture, being rugged in construction, and serving to cushion theimpact of a door therewith when the door is opened and to hold the dooragainst undesired closing from drafts, or other causes, while at thesame time, being readily yieldable Further objects and advantages of theinvention will become apparent from the following description andclaims, and from the accompanying drawings, wherein:

Figure 1 is an elevational view of a doorway and a portion of the walladjacent thereto, the wall and the door associated with the doorwaybeing provided with an improved door stop assembly constructed inaccordance with the present invention.

Figure 2 is an enlarged horizontal cross sectional view taken on theline 22 of Figure 1, shown with the elements of the door stop assemblyin engaging positions.

Figure 3 is an enlarged cross sectional detail view taken on the line 33of Figure 2, showing the cushion element slightly separated from thepermanent magnet element of .the door stop assembly of Figures 1 and 2.

Referring to e drawings, 11 designates a doorway provided in a wall 12,the doorway having the swingable door 13 mounted therein. Adjacent thedoorway 11 on the wall 12 is the usual baseboard 14.

Secured to the baseboard 14 is a pedestal member 15, said pedestalmember being provided with the screw element 16 at its end portion whichis engageable in the baseboard 14. The outer end portion of the pedestal15 has secured thereto a circular permanent magnet 17, said magnet beingarranged perpendicular to the axis of the pedestal f: as shown in Figure3, and being fastened axially to the pedestal by a flat-headed machinescrew 18 engaged centrally through the permanent magnet 17 andthreadedly engaged in the end of the pedestal 15, as is clearlyillustrated in Figure 3.

Designated generally at 20 is a cushioning member which is secured tothe door 13 at a location corresponding to the distance of the pedestal15 from the hinge axis of the door 13 and at the same height as saidpedestal, whereby the cushion assembly 20 is engageable with thepermanent magnet 17 when the door is swung to its fully open position.The cushion assembly 20 comprises a flat-headed fastening screw 21engaged in the door, said fastening screw 21 passing centrally through acollar ele- 2,761,718 Patented Sept. 4, 1956 nated at 25 is a coiledspring having one end thereof engaged in the aforesaid retaining cupdefined by the collar 23. The other end of the coiled spring engages anannular collar 27 provided with an inwardly projecting conical centralportion 28 which is engaged with the head of the fastening screw 21, asis clearly shown in Figure 3, thus being restrained from separation fromthe fasten- 0. ing screw 21. The collar element 27 is formed with theannular marginal flange 28 substantially equal in diameter to andopposing the flange 24, thus defining an annular seat for the outer endof the coiled spring 25. Said coiled spring biases the collar element 27outwardly and provides a cushion effect, cushioning the impact of thedoor with the permanent magnet 17 When the door is swung to its fullyopen position.

The collar element 27 is formed of suitable magnetic material, wherebysaid collar element will be attracted and held by the permanent magnet17 when the door is swung to its fully open position.

As will be readily understood, the permanet magnet 17 cooperates withthe magnetic collar 27 to hold the door open to prevent the door frombeing slammed or swung closed by drafts, or other air movements.However, the door may be readily closed by exerting a manual forcethereon to disengage the collar 27 from the permanent magnet 17.

While a specific embodiment of an improved door stop assembly has beendisclosed in the foregoing description, it will be understood thatvarious modifications within the spirit of the invention may occur tothose skilled in the art. Therefore, it is intended that no limitationsbe placed on the invention except as defined by the scope of theappended claims.

What is claimed is:

1. A door stop assembly comprising a pedestal member adapted to besecured to a wall adjacent a door, a permanent magnet mounted on the endof said pedestal member, and a resilient cushion member of magneticmaterial adapted to be mounted on the door at a location to engage saidpermanet magnet when the door is swung open, said cushion membercomprising a headed fastener engageable with the door, a collar elementof magnetic material slidably engaged on said fastener and held againstremoval by the head of said fastener, and spring means on the fastenerurging said collar element outwardly.

2. A door stop assembly comprising a pedestal member adapted to besecured to a wall adjacent a door, a permanent magnet mounted on the endof said pedestal member, and a resilient cushion member of magneticmaterial adapted to be mounted on the door at a location to engage saidpermanent magnet when the door is swung open, said cushion membercomprising a fastener engageable with the door, a conical head on theend of said fastener, an annular collar of magnetic material slidablyengaged on said fastener and having a generally conical inner portionengageable with said head to prevent removal of said collar from saidfastener, an annular bearing collar on said fastener, and a coiledspring surrounding said fastener and acting between said collars to biasthe first-named collar outwardly.

Berry Feb. 7, 1950 Byrd Aug. 22, 1950

